(function($) {

	$.fn.dirtyFields = function(parameters) {
	
		var opts = $.extend({}, $.fn.dirtyFields.defaults, parameters);
		
		return this.each(function() {
			var $container= $(this);
			
			$container.data("dF",opts);
			$container.data("dF").dirtyFieldsDataProperty= new Array;
			
			$("input[type='text'],input[type='file'],input[type='password'],textarea",$container).each(function(i) {
				$.fn.dirtyFields.configureField($(this),$container,"text");
			});
			
			$("select",$container).each(function(j) {
				$.fn.dirtyFields.configureField($(this),$container,"select");
			});	
			
			$(":checkbox,:radio",$container).each(function(k) {
				$.fn.dirtyFields.configureField($(this),$container,"checkRadio");	
			});
			
			$.fn.dirtyFields.setStartingValues($container);
		
		});
		
	};  
	
	
	$.fn.dirtyFields.defaults = {
		   checkboxRadioContext: "next-span",
		   denoteDirtyOptions: false,
		   denoteDirtyForm: false,
		   dirtyFieldClass: "dirtyField",
		   dirtyFieldsDataProperty:"dirtyFields",
		   dirtyFormClass: "dirtyForm",
		   dirtyOptionClass: "dirtyOption",
		   fieldChangeCallback: "",
		   formChangeCallback: "",
		   preFieldChangeCallback: "",
		   startingValueDataProperty:"startingValue",
		   textboxSelectContext: "id-for",
		   trimText: false,
		   fieldOverrides: {none:"none"}
		  };
	
	
	$.fn.dirtyFields.configureField= function($object,$container,context,target) {
		if (typeof target != "undefined") {
			$container.data("dF").fieldOverrides[$object.attr("id")]= target;
		}
		
		switch(context) {
			case "text":
				$object.change(function() {
					if ($.isFunction($container.data("dF").preFieldChangeCallback)) {
						if($container.data("dF").preFieldChangeCallback.call($object,$object.data($container.data("dF").startingValueDataProperty))== false)
						{
							return false;
						};
					}	
					evaluateTextElement($object,$container);	
				});	
			break;
			
			case "select":
				$object.change(function(){
					if ($.isFunction($container.data("dF").preFieldChangeCallback)) {
						if ($container.data("dF").preFieldChangeCallback.call($object, $object.data($container.data("dF").startingValueDataProperty)) == false) {
							return false;
						};
												}
					
					evaluateSelectElement($object, $container);
				});
			break;
			
			case "checkRadio":
				$object.change(function() {
					if ($.isFunction($container.data("dF").preFieldChangeCallback)) {
						if($container.data("dF").preFieldChangeCallback.call($object,$object.data($container.data("dF").startingValueDataProperty))== false)
						{
							return false;
						};
					}	
					evaluateCheckboxRadoElement($object,$container);	
				});	
			break;
		}	
		
	};
	
	
	$.fn.dirtyFields.formSaved= function($container) {
		$.fn.dirtyFields.setStartingValues($container);
		$.fn.dirtyFields.markContainerFieldsClean($container);	
	};
	
	$.fn.dirtyFields.markContainerFieldsClean = function($container){
		var fieldArray= new Array();
		$container.data("dF").dirtyFieldsDataProperty= fieldArray;
		
		$("." + $container.data("dF").dirtyFieldClass,$container).removeClass($container.data("dF").dirtyFieldClass);
		if($container.data("dF").denoteDirtyOptions)
			{
				$("." + $container.data("dF").dirtyOptionClass,$container).removeClass($container.data("dF").dirtyOptionClass);
			}
		if($container.data("dF").denoteDirtyForm)
			{
				$container.removeClass($container.data("dF").dirtyFormClass);
			}
	};
	
	$.fn.dirtyFields.setStartingValues= function($container,opts) {
		$("input[type='text'],input[type='file'],input[type='password'],:checkbox,:radio,textarea",$container).each(function(i) {
				var $object= $(this);
				if($object.attr("type")== "radio" || $object.attr("type")== "checkbox")
					{
						$.fn.dirtyFields.setStartingCheckboxRadioValue($object,$container);
					}
				else
					{
						$.fn.dirtyFields.setStartingTextValue($object,$container);
					}
		});
		
		$("select",$container).each(function (j) {
			$.fn.dirtyFields.setStartingSelectValue($(this),$container);
		});
	};  
	
	
	$.fn.dirtyFields.setStartingTextValue = function($objects,$container){
		return $objects.each(function() {
			var $object= $(this);
			$object.data($container.data("dF").startingValueDataProperty,$object.val());
		});
	};
	
	$.fn.dirtyFields.setStartingCheckboxRadioValue = function($objects,$container){
		return $objects.each(function() {
			var $object= $(this);
			if($object.attr("checked"))
				{
					$object.data($container.data("dF").startingValueDataProperty,true);
				}
			else
				{
					$object.data($container.data("dF").startingValueDataProperty,false);
				}
		});
	};
	
	$.fn.dirtyFields.setStartingSelectValue = function($objects,$container){
		return $objects.each(function() {
			var $object= $(this);
			if($container.data("dF").denoteDirtyOptions== false && $object.attr("multiple")== false)
				{
					$object.data($container.data("dF").startingValueDataProperty,$object.val());
				}
			else
				{
					var valArray= new Array;
					$object.children("option").each(function(o) {
							var $option= $(this);
							if($option.attr("selected"))							
								{
									$option.data($container.data("dF").startingValueDataProperty,true);
									valArray.push($option.val());
								}
							else
								{
									$option.data($container.data("dF").startingValueDataProperty,false);
								}
							
						});
					$object.data($container.data("dF").startingValueDataProperty,valArray);
				}
		});
	};
	
	
	$.fn.dirtyFields.rollbackTextValue = function($objects,$container, processChange){
		if(typeof processChange== "undefined") {processChange= true}
		return $objects.each(function() {
			var $object= $(this);
			$object.val($object.data($container.data("dF").startingValueDataProperty));
			if(processChange)
				{
					evaluateTextElement($object,$container)
				}
		});
	};
	
	$.fn.dirtyFields.updateTextState = function($objects,$container){
		return $objects.each(function() {
			evaluateTextElement($(this),$container)
		});
	};
	
	
	$.fn.dirtyFields.rollbackCheckboxRadioState= function($objects,$container,processChange) {
		if(typeof processChange== "undefined") {processChange= true}
		return $objects.each(function() {
			var $object= $(this);
			if($object.data($container.data("dF").startingValueDataProperty))
				{
					$object.attr("checked",true);
				}
			else
				{
					$object.attr("checked",false);
				}
			
			if(processChange)
				{
					evaluateCheckboxRadoElement($object,$container);
				}
		});
	};
	
	$.fn.dirtyFields.updateCheckboxRadioState= function($objects,$container) {
		return $objects.each(function() {
			evaluateCheckboxRadoElement($(this),$container);
		});
	};
	
	$.fn.dirtyFields.rollbackSelectState= function($objects,$container,processChange) {
		if(typeof processChange== "undefined") {processChange= true}
		return $objects.each(function() {
			var $object= $(this);
			if($container.data("dF").denoteDirtyOptions== false && $object.attr("multiple")== false)
				{
					$object.val($object.data($container.data("dF").startingValueDataProperty));
				}
			else
				{
					$object.children("option").each(function(o) {
						var $option= $(this);
						if($option.data($container.data("dF").startingValueDataProperty))
							{
								$option.attr("selected",true);
							}
						else
							{
								$option.attr("selected",false);
							}		
					});
				}
				
			if(processChange) 
				{
					evaluateSelectElement($object,$container);
				}
		});
	};
	
	$.fn.dirtyFields.updateSelectState= function($objects,$container) {
		return $objects.each(function() {
			evaluateSelectElement($(this),$container);
		});
	};
	
	
	$.fn.dirtyFields.rollbackForm= function($container) {
		$("input[type='text'],input[type='file'],input[type='password'],:checkbox,:radio,textarea",$container).each(function(i) {
					$object= $(this);
					if($object.attr("type")== "radio" || $object.attr("type")== "checkbox")
						{
							$.fn.dirtyFields.rollbackCheckboxRadioState($object,$container,false);
						}
					else
						{
							$.fn.dirtyFields.rollbackTextValue($object,$container,false);
						}
			});
			
			$("select",$container).each(function (j) {
				$.fn.dirtyFields.rollbackSelectState($(this),$container,false);
			});
			
			$.fn.dirtyFields.markContainerFieldsClean($container);
	};  

		
	$.fn.dirtyFields.isDirty = function($container) {
		if ( $container.data("dF").dirtyFieldsDataProperty.length )
			{
				return true;
			}
		else
			{
				return false;
			}
	};


	function updateDirtyFieldsArray(objectName,$container,status) {
		var dirtyFieldsArray= $container.data("dF").dirtyFieldsDataProperty;
		var index= $.inArray(objectName,dirtyFieldsArray);
		if(status== "dirty" && index== -1)
			{
				dirtyFieldsArray.push(objectName);
				$container.data("dF").dirtyFieldsDataProperty= dirtyFieldsArray;
			}
		else if(status== "clean" && index > -1)
			{
				dirtyFieldsArray.splice(index,1);
				$container.data("dF").dirtyFieldsDataProperty= dirtyFieldsArray;
			}
	};
	
	function updateFormStatus($container) {
		if($("." + $container.data("dF").dirtyFieldClass,$container).length > 0)
			{
				$container.addClass($container.data("dF").dirtyFormClass);
				if($.isFunction($container.data("dF").formChangeCallback))
					{
						$container.data("dF").formChangeCallback.call($container,true,$container.data("dF").dirtyFieldsDataProperty);
					}
			}
		else
			{
				$container.removeClass($container.data("dF").dirtyFormClass);
				if($.isFunction($container.data("dF").formChangeCallback))
					{
						$container.data("dF").formChangeCallback.call($container,false,$container.data("dF").dirtyFieldsDataProperty);
					}
			}
	};  

	function updateContext(context,$object,status,$container) {
		var overrides= $container.data("dF").fieldOverrides;
		var elemId= $object.attr("id");
		var overridden= false;
		for (var overrideId in overrides)
					{
							if(elemId== overrideId)
								{
									if(status== "changed")
										{
											$("#" + overrides[overrideId]).addClass($container.data("dF").dirtyFieldClass);
										}
									else
										{
											$("#" + overrides[overrideId]).removeClass($container.data("dF").dirtyFieldClass);
										}
									overridden= true;
								}
					}
		if(overridden== false)
			{
				if(context== "textboxSelectContext")
					{
						var updateSettings= $container.data("dF").textboxSelectContext;
					}
				else
					{
						var updateSettings= $container.data("dF").checkboxRadioContext;
					}
				
				var updateSettingsArray= updateSettings.split("-");
		
				switch (updateSettingsArray[0])
					{
						case "next":
							if(status== "changed")
								{
									$object.next(updateSettingsArray[1]).addClass($container.data("dF").dirtyFieldClass);
								}
							else
								{
									$object.next(updateSettingsArray[1]).removeClass($container.data("dF").dirtyFieldClass);
								}
							break;
				
						case "previous":
							if(status== "changed")
								{
									$object.prev(updateSettingsArray[1]).addClass($container.data("dF").dirtyFieldClass);
								}
							else
								{
									$object.prev(updateSettingsArray[1]).removeClass($container.data("dF").dirtyFieldClass);
								}
							break;
							
						case "closest":
							if(status== "changed")
								{
									$object.closest(updateSettingsArray[1]).addClass($container.data("dF").dirtyFieldClass);
								}
							else
								{
									$object.closest(updateSettingsArray[1]).removeClass($container.data("dF").dirtyFieldClass);
								}
							break;
						
						default:
							if(updateSettingsArray[0]== "id" || updateSettingsArray[0]== "name")
								{
										switch (updateSettingsArray[1])
											{
												case "class":
												if(status== "changed")
													{
														$("." + $object.attr(updateSettingsArray[0]),$container).addClass($container.data("dF").dirtyFieldClass);
													}
												else
													{
														$("." + $object.attr(updateSettingsArray[0]),$container).removeClass($container.data("dF").dirtyFieldClass);
													}
												break;
												
												case "title":
												if(status== "changed")
													{
														$("*[title='" + $object.attr(updateSettingsArray[0]) + "']",$container).addClass($container.data("dF").dirtyFieldClass);
													}
												else
													{
														$("*[title='" + $object.attr(updateSettingsArray[0]) + "']",$container).removeClass($container.data("dF").dirtyFieldClass);
													}
												break;
												
												case "for":
												if(status== "changed")
													{
														$("label[for='" + $object.attr(updateSettingsArray[0]) + "']",$container).addClass($container.data("dF").dirtyFieldClass);
													}
												else
													{
														$("label[for='" + $object.attr(updateSettingsArray[0]) + "']",$container).removeClass($container.data("dF").dirtyFieldClass);
													}
												break;		
											}
								}
							break;
						
						
					}
		}
		
	};

	function evaluateTextElement($object,$container) {
		var objectName= $object.attr("name");
		var elemDirty= false;
		
		if($container.data("dF").trimText)
			{
				var elemValue= jQuery.trim($object.val());
			}
		else
			{
				var elemValue= $object.val();
			}
			
		if (elemValue != $object.data($container.data("dF").startingValueDataProperty))
			{
				updateContext("textboxSelectContext",$object,"changed",$container);
				updateDirtyFieldsArray(objectName,$container,"dirty");
				elemDirty= true;
			}
		else 
			{
				updateContext("textboxSelectContext",$object,"unchanged",$container);
				updateDirtyFieldsArray(objectName,$container,"clean");
			}
		
		if($.isFunction($container.data("dF").fieldChangeCallback))
			{
				$container.data("dF").fieldChangeCallback.call($object,$object.data($container.data("dF").startingValueDataProperty),elemDirty);
			}
		
		
		if($container.data("dF").denoteDirtyForm)
			{
				updateFormStatus($container);
			}
		
	} ;

	function evaluateSelectElement($object,$container) {
		var objectName= $object.attr("name");
		var elemDirty= false;
		
		if($container.data("dF").denoteDirtyOptions== false && $object.attr("multiple")== false)
			{
				if ($object.val() != $object.data($container.data("dF").startingValueDataProperty))
					{
						updateContext("textboxSelectContext",$object,"changed",$container);
						updateDirtyFieldsArray(objectName,$container,"dirty");
						elemDirty= true;
					}
				else
					{
						updateContext("textboxSelectContext",$object,"unchanged",$container);
						updateDirtyFieldsArray(objectName,$container,"clean");
					}
			}
		else
			{
				var optionsDirty= false;
				$object.children("option").each(function(o) {
					var $option= $(this);
					var isSelected= $option.attr("selected");
					if(isSelected != $option.data($container.data("dF").startingValueDataProperty))
						{
							if ($container.data("dF").denoteDirtyOptions) {
								$option.addClass($container.data("dF").dirtyOptionClass);
							}
							optionsDirty= true;
						}
					else
						{
							if ($container.data("dF").denoteDirtyOptions) {
								$option.removeClass($container.data("dF").dirtyOptionClass);
							}	
						}
				});
				
				if(optionsDirty)
					{
						updateContext("textboxSelectContext",$object,"changed",$container);
						updateDirtyFieldsArray(objectName,$container,"dirty");
						elemDirty= true;
					}
				else
					{
						updateContext("textboxSelectContext",$object,"unchanged",$container);
						updateDirtyFieldsArray(objectName,$container,"clean");
					}
			}
			
		if($.isFunction($container.data("dF").fieldChangeCallback))
			{
				$container.data("dF").fieldChangeCallback.call($object,$object.data($container.data("dF").startingValueDataProperty),elemDirty);
			}
			
		if($container.data("dF").denoteDirtyForm)
			{
				updateFormStatus($container);
			}
			
	};
	
	function evaluateCheckboxRadoElement($object,$container) {
		var objectName= $object.attr("name");
		var elemDirty= false;
		
		var isChecked= $object.attr("checked");
		if(isChecked != $object.data($container.data("dF").startingValueDataProperty))
			{
				updateContext("checkboxRadioContext",$object,"changed",$container);
				elemDirty= true;
			}
		else
			{
				updateContext("checkboxRadioContext",$object,"unchanged",$container);
			}
			
		if($object.attr("type")== 'radio')
			{
				$(":radio[name='" + objectName + "']",$container).each(function(r) {
					var $thisRadio= $(this);
					var radioName= $thisRadio.attr("name");
					var thisIsChecked= $thisRadio.attr("checked");
					if(thisIsChecked != $thisRadio.data($container.data("dF").startingValueDataProperty))
						{
							updateContext("checkboxRadioContext",$thisRadio,"changed",$container);
							elemDirty= true;
						}
					else
						{
							updateContext("checkboxRadioContext",$thisRadio,"unchanged",$container);
						}
				});
			}
		
		if(elemDirty) 
			{
				updateDirtyFieldsArray(objectName,$container,"dirty");
			}
		else 
			{
				updateDirtyFieldsArray(objectName,$container,"clean");
			}
		
		if($.isFunction($container.data("dF").fieldChangeCallback))
			{
				$container.data("dF").fieldChangeCallback.call($object,$object.data($container.data("dF").startingValueDataProperty),elemDirty);
			}
		
		if($container.data("dF").denoteDirtyForm)
			{
				updateFormStatus($container);
			}
	};



})(jQuery);